The Protocols and Ports
Araz Ahmadov
VCTA-DCV / Contributor, Top System Administration Badge Owner in LinkedIN / Member of IAPWE / Contributor in GeeksforGeeks / IT System Administrator, Instructor, Influencer and Technical Writer
Hi there,
In this little article-based note, I'll go through the most of protocols and ports they use. In addition, I'd like to note that in my next articles I'll provide detailed information on the use of some protocols. Thus, briefly, in this little article-based note, I'll summarize all of the information about the protocols, so that you can refer to this information in a concise way through this platform, and not to individual sites in job interviews or other exam-type meetings. So, let's get started:
* LDAP (Lightweight Directory Access Protocol) - the default port number is 389, but over TLS/SSL it uses 636 port, (TCP and UDP)
* RDP (Remote Desktop Protocol) - 3389 (TCP and UDP)
* DNS ( Domain Name System) - 53 (TCP and UDP)
* DHCP (Dynamic Host Configuration Protocol) - 67,68 (UDP)
* (HTTP) Hypertext Transfer Protocol - 80 (TCP)
* (SSL) HTTP with Secure Sockets Layer - 443 (TCP and UDP)
* (TFTP) Trivial File Transfer Protocol - 69 (UDP)
* (POP3) Post Office Protocol - default port number is 110, but over TLS/SSL it uses 995 port, (TCP)
* (SMTP) Simple Mail Transfer Protocol - the default port number is 25, but over TLS/SSL it uses 465 port, (TCP)
* (IMAP4) Internet Message Access Protocol - the default port number is 143, but over TLS/SSL it uses 993 port, (TCP and UDP)
* (SNMP) Simple Network Management Protocol - 161, 162 (TCP and UDP)
* FTP (File Transfer Protocol) - the default port number is 20, 21, but over TLS/SSL it uses 989, 990 port, (TCP)
* NetBIOS (Network Basic Input/Output System) - 135-139 (TCP)
* NTP (Network Time Protocol) - 123 (UDP)
* NNTP (Network News Transport Protocol) - 119 (TCP)
* IpSec (Internet Protocol Security) - 50, 51 (UDP)
* (SSH) Secure Shell - 22 (TCP and UDP)
* Telnet - 23 (TCP)
* (ICMP) Internet Control Message Protocol - 7 (TCP and UDP)
* Kerberos - 88 (UDP)
* (IGMP) Internet Group Management Protocol - UpLink Port
* (RADIUS) Remote Authentication Dial-In User Service - 1812, 1813 (UDP)
Dear all (IT),
I hope and wish, these notes (about the protocols and ports) will be helping you out. See you in the next articles...
Thank you and good luck!
Kind Regards,
Araz Ahmadov